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Stuart Robert says he's paid the price

Former Liberal minister Stuart Robert says what he did to be booted from the frontbench was probably unwise and he's paid the price.

But now there's media speculation he could return to the ministry.

Mr Robert, the former minister for veterans affairs and human services, said this wasn't something an MP could have a conversation with Prime Minister Malcolm Turnbull about.

"The prime minister alone determines. As we like to say, the prime minister giveth and the prime minister taketh away. Blessed be the name of the prime minister," he said on Sky News.

Mr Robert said the PM was in no hurry as the current frontbench was doing a good job.

Mr Robert resigned from the frontbench last year after it was found he breached ministerial standards by taking a personal trip to China in 2014 that involved witnessing the signing of a mining deal and discussions with government officials.

"With hindsight and on reflection it was probably unwise. But I was certainly on leave and I covered my own costs," he said.